AGU journal highlights -- July 23, 2008(troradiometer for 4 months in 2005. Thro...)

Date:7/24/2008

troradiometer for 4 months in 2005. Through the global maps generated, they find that the detailed nature of cloud microphysical perturbations, as well as the unperturbed cloud properties, is important for determining the radiative forcing associated with the Twomey effect.

Title: The radiative susceptibility of cloudy atmospheres to droplet number perturbations, part 2: Global analysis from MODIS

Authors: Lazaros Oreopoulos and Steven Platnick: Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, Maryland, U.S.A.; and Laboratory for Atmospheres, NASA Goddard Space Flight Center, Greenbelt, Maryland, U.S.A.

Source: Journal of Geophysical Research-Atmospheres (JGR-D) paper 10.1029/2007JD009655, 2008; http://www.agu.org/journals/pip/jd/2007JD009655-pip.pdf This paper is "in press".

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8. Taking sharper look at key atmospheric region

The middle atmosphere is composed of the stratosphere and mesosphere and extends from about 12 to 90 kilometers (7.5 to 56 miles) in altitude. This region is important because it houses ozone, which shields the Earth from ultraviolet light, and gravity and planetary waves, which influence weather close to the Earth's surface. Many atmospheric general circulation models (GCMs) currently used for climate studies do not have sufficiently high spatial resolution to resolve small-scale gravity waves. To understand the roles of such small-scale phenomena in the Earth's climate, Watanabe et al. develop a new GCM that uses very high spatial resolution. This model has horizontal resolution of 0.5625 degrees in latitude and longitude, and covers a region that extends from the surface to a height of about 85 km (53 mi) with uniform vertical resolution of 300 meters (980 feet) throughout the middle atmosphere. This GCM successfully simulates the spontaneous generation o
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Contact: Peter Weiss pweiss@agu.org 202-777-7507 American Geophysical Union Source:Eurekalert

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